Granted Patent
Utility
US 4,403,909 · App. 06/289,575
Method for discharging catalyst particles from a moving bed system at a substantially steady flow rate
Inventor:
Arthur R. Greenwood
Patented Case
View Patent ↗
Granted: Sep 13, 1983
Filed: Aug 3, 1981
Inventor
Arthur R. Greenwood
Assignee (at issue)
UOP LLC
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.